Debt and Other Borrowings - Components of Debt (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 351,300,000	$ 351,700,000
Less: debt payable within one year	2,400,000	2,800,000
Debt payable after one year	$ 348,900,000	$ 348,900,000
Weighted average interest rates on total debt obligations	5.50%	5.50%
Finance lease obligations	$ 2,700,000	$ 3,000,000.0
Senior Notes | 5.5% Senior notes due in 2026
Debt Instrument [Line Items]
Stated interest rate	5.50%
Unamortized debt issuance cost	$ 3,100,000	3,300,000
Total debt	346,900,000	346,600,000
Revolving credit facility due 2023 | Revolving credit facility
Debt Instrument [Line Items]
Unamortized debt issuance cost	1,700,000	2,200,000
Total debt	0	0
Aggregate available principal amount	350,000,000.0	350,000,000.0
Other borrowings
Debt Instrument [Line Items]
Total debt	4,400,000	5,100,000
Lines of credit and other borrowings
Debt Instrument [Line Items]
Total debt	1,700,000	$ 2,100,000
Aggregate available principal amount	$ 45,100,000